Physics

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One kilowatt-hour represents A) 1 N. B) 60 N/s. C) 60,000 W. D) 3.6 million joules. E) none ... Started by londonang	3 Replies 94 Views	Jul 29, 2018 by cloud
A 1000-kg car and a 2000-kg car are hoisted to the same height. Raising the more massive car ... Started by Pineappleeh	1 Replies 44 Views	Jul 29, 2018 by jgranad15
The power expended doing 100 J of work in 50 s is A) 1/2 W. B) 2 W. C) 4 W. D) 50 W. E) 5,000 ... Started by tsand2	1 Replies 34 Views	Jul 29, 2018 by Loise Hard
Both a 50-kg sack is lifted 2 meters from the ground and a 25-kg sack is lifted 4 meters in the same ... Started by Hungry!	1 Replies 97 Views	Jul 29, 2018 by gasdhashg
Relative to an initial height, an object raised twice as high has a gravitational potential energy ... Started by jasdeep_brar	3 Replies 82 Views	Jul 29, 2018 by mcomstock09
A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is A) 6 J. ... Started by skymedlock	1 Replies 92 Views	Jul 29, 2018 by Jadwiga9
A crate of grapes lifted 10 meters gains 200 J of potential energy. If the same crate is instead ... Started by jeatrice	1 Replies 78 Views	Jul 29, 2018 by KKcool
The ram of a pile driver drops onto the top of an iron beam, driving it partway into the ground. The ... Started by ereecah	1 Replies 138 Views	Jul 29, 2018 by Liamb2179
Danny Diver weighs 500 N and steps off a diving board 10 m above the water. Danny hits the water ... Started by geodog55	3 Replies 98 Views	Jul 29, 2018 by BUTTHOL369
A bicycle that travels twice as fast as another when braking to a stop will skid A) twice as far. ... Started by shenderson6	1 Replies 115 Views	Jul 29, 2018 by kristenb95
Two identical particles move toward each other, one twice as fast as the other. Just before they ... Started by formula1	1 Replies 33 Views	Jul 29, 2018 by onowka
Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground ... Started by Jkov05	1 Replies 133 Views	Jul 29, 2018 by ririgirl15
A bicycle that travels four as fast as another when braking to a stop will skid A) twice as far. ... Started by clippers!	3 Replies 131 Views	Jul 29, 2018 by k2629
Two identical arrows, one with twice the kinetic energy of the other, are fired into a bale of hay. ... Started by darbym82	1 Replies 43 Views	Jul 29, 2018 by kbennett34
A 2500-N pile-driver ram falls 10 m and drives a post 0.1 m into the ground. The average impact ... Started by Mr3Hunna	1 Replies 94 Views	Jul 29, 2018 by Cheesycrackers
A block of ice sliding down an incline has half its maximum kinetic energy A) at the top. B) at ... Started by lak	1 Replies 81 Views	Jul 29, 2018 by steff9894
A light aluminum ball and a heavy lead ball of the same size roll down an incline. When they are ... Started by laurencescou	3 Replies 106 Views	Jul 29, 2018 by leahchrapun
The bob of a simple pendulum has its maximum kinetic energy at the A) top of its swing. B) ... Started by bio_gurl	1 Replies 107 Views	Jul 29, 2018 by verrinzo
A common pulley acts similar to a A) hydraulic press. B) gear. C) common lever. D) tension ... Started by nmorano1	1 Replies 52 Views	Jul 29, 2018 by laurnthompson
A 1-kg ball dropped from 2 m rebounds only 1.5 m after hitting the ground. The amount of energy ... Started by Chloeellawright	1 Replies 81 Views	Jul 29, 2018 by matt95
A machine puts out 100 watts of power for every 1000 watts put into it. The efficiency of the ... Started by maychende	3 Replies 246 Views	Jul 29, 2018 by chjcharjto14
Phil applies 100 N to a pulley system and raises a load one-tenth of his downward pull. Ideally, the ... Started by natalie2426	1 Replies 102 Views	Jul 29, 2018 by canderson530
When properly used, a hydraulic press, like a wheel and axle, is capable of multiplying force input. ... Started by serike	1 Replies 79 Views	Jul 29, 2018 by dyrone
A miracle car with a 100 efficient engine burns fuel having a 40-megajoules-per-liter energy ... Started by D2AR0N	1 Replies 46 Views	Jul 29, 2018 by vkodali
Earth's primary energy source is A) the Sun. B) fossil fuel. C) electricity. D) ... Started by Chloeellawright	3 Replies 85 Views	Jul 29, 2018 by allisonblackmore